Grate foe bames



(No Model.)

'J MARTINO.

, I GRATE FOR RAKGES. v No. 259,183.. Patented June 6,'1882.

TICJ v A W WWW UNITED STATES PATENT OFFICE.

JOHN MARTINO, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHARLES WILLIAMS SONS, OF SAME PLACE.

GRATE FO R RANGES 'SPECIFICATION forming part of Letters Patent No. 259,183, dated June 6, 1882.

Application filed August 22, 1881. (No model.)

To all whom it may concern:

Beitknown that I, JOHN MARTINO, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in- Grates for Ranges, Furnaces, 850., of which the followingis a specification.

My invention is an improvement on the twopart grate for which Samuel Smith obtained Letters Patent dated October 21, 1873, No. 143,856, the parts meeting in the'middle and forming a concave bed for the coal, and having circular end bars concentric with journals on which the semi-grates turn, and the frontjournals having a geared connection, so that force applied to one part to turn it in one direction to discharge the clinkers -Wl1l turn the other part in the opposite direction, at the same time taking the bars apart (on which the coal rests when the grate is in its normal position) for the discharge of the clinkers and bringing the concentricend bars of the semi-grates together to hold the live coal above the clinkers until 2 5 a reverse movement is given to bring the parts back to their normal position. Such a construction has been found to answer for small fire-places, but impracticable for large ones, because it the grates were .made large too great a quantityof live coal would escape in the discharge of the clinkers, and it a number of small grates of practicable size were combined to form a sufticiently-large grate-surface the coal lying on their concentric end bars would be jammed between the curved faces of the bars when turned toward each other in bringingthe sections of the grates to their normal position after the discharge of the clinkers.

To meet this diff culty and give practicability to combined grates of any desired width is the object of my invention; and the nature of the invention consists in the combination of an intermediate bar withthe concentric ends of contiguous sections of the combined grate in such a manner that as said ends turn toward each other as the grates are brought to their normal position after the discharge of the clinkers they turn under and in close proximity to the said intermediate bar, whereby the jammingof thelive coalsis prevented, as hereinafter fully described. By this means the grates may be made of small size, and thusin a great measure prevent the live coal escaping with the clinkers. v 5

In the accompanying drawings, which make a part of this specification, Figure 1 is aplan View of two two-part grates having a bar, G, arranged at their meeting ends, and similar bars at their outer ends. Fig. 2 is a vertical section atthe line 00 0c of Fig. 1.

Like letters of reference in both figures indicate the same parts.

A A and A A represent two two-part grates, having bars a for holding the coal when in their normal position, the bars, when their ends are brought together, forming a concave bed for the coals. There are end bars b,-'whic h turn under the live coal above the clinkers, when the semi-grates are turned partly around for the discharge of the latter. The semigrates are provided with journals 0, and the front journals are geared together by means of cog-wheels B, so that by means of a lever or crank, which inay be connected with one of the journals, all the grates canbe turned simultaneously, and the two parts of each section turned toward each other, whereby the middle bars, a, would be turned downward to form an opening for the discharge of the clinkers, and the end bars 1) toward the middle of the sections until they meet and under the live coals, thus preventing their escape, as represented at the right hand of Fig. 2. After the discharge of the clinkers the crank is turned in the reverse direction until the ends of the bars a of each grate meet together to form concave beds for the coal, as seen at the left hand of the drawings.

0 is a cross-bar having tenons d, which fit 0 in corresponding openings of the front and back plates of the fire-chamber, above the space between the contiguous end of the end bars I) of the two grates. They have double inclines provided with cross-ribs e, to cause 5 the body of coal above the bar to separate and fall toward the centers of the two grates.

It will readily be seen that without the use of this bar it would be impracticable to combine two grates, as in bringing the semi-grates 10o back to their normal position, after discharging the clinkers, the coal would inevitably jam between the surfaces of the bars. I have a double object in view in ribbing the inclines of the ban-namely, to lessen their frictional surfaces, and thus give greater facility to the sliding of the coal over them toward the centers of the grates, and also to form channel f for the free passage of air to the coal to assist the combustion. The ribs are omitted on the outer inclines of the end bars 0 O, as they connect with the end fire-bricks. The bars 0, although having angular surface for the sliding down of the coal, maybe made-of any other shape and answer the purpose ot'the invention.

I have only shown two twopart grates in combination in the drawings by way of illustration; but itwill be seen that any number of grates may be combined to make the gratesurface as wide as may be required, and that the semi-grates may be sm allerthan is required for a single two-part grate, and thus avoid effectually the escape of live coals.

I claim as my invention- In a combined two-part grate, having sections composed of middle bars, a, which form a concave bed for holding the live coal, and end bars 1/, concentric with the journals 0 of the sections, the combination, with said end bars I), of intermediate cross-bars G, arranged as described, whereby as the middle bars, a, are turned downward for the discharge of the clinkers and are returned to their normal position the end bars turn freely under the live coals as they pass under the bars (J, whereby the jamming of the coals is prevented, substantially as described.

JOHN MARTINO.

Witnesses:

THOMAS J. BEWLEY, STEPHEN USTICK. 

